Cole: Phoebe, I love you. I don't know what's going on but maybe I can help. Would you like me to kill someone for you?
Paige: Well, you wanted to live like us. Now you get to die like us.
Paige: Power. Power's good. I like power. Why do I like power?
Piper: Darryl, I'm sorry, but what do you want me to say? My sister was just possessed with a supernaturally born killer and my husband is in 1994, and I do not mean in the fashion sense. He time traveled back with my other sister so the only one left to help me is you.
Piper: Don't act blonde.
Darryl: Oh, no creepy talk in the precinct. Will you just keep down the creepy talk.
Answer: That was a mistake in the series.
Also, the episode is called 'Babies First Demon' and this alone tells us that it's Wyatt's first time in the field (so to speak) and as the sisters say, they've done a good job of clearing up their own magical messes so far. Nobody really knows how advanced Wyatt's powers are, or will become. That's why the cleaners appear, to nip things in the bud. The Cleaners didn't want to chance that the sisters could clean Wyatt's magic up, just incase they couldn't. Therefore intervening themselves, just in case.